Auto migration in EF Core in three tier application

i have three tier application in Asp.net Mvc Core and use EF core, now i want create auto migration ,

i have DAL layer that my context available here

public class AdminContext : DbContext
    {

    public AdminContext(DbContextOptions<AdminContext> options) : base(options)
    {

    }
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {

        base.OnModelCreating(modelBuilder);

        modelBuilder.Entity<AdsAdsCategory>()
             .HasKey(bc => new { bc.AdsId, bc.AdsCategoryId });

        modelBuilder.Entity<AdsAdsCategory>()
            .HasOne(bc => bc.Ads)
            .WithMany(b => b.AdsAdsCategories)
            .HasForeignKey(bc => bc.AdsId);

        modelBuilder.Entity<AdsAdsCategory>()
            .HasOne(bc => bc.Category)
            .WithMany(c => c.AdsAdsCategories)
            .HasForeignKey(bc => bc.AdsCategoryId);
    }

    public DbSet<Ads> Adses { get; set; }
    public DbSet<AdsCategory> AdsCategories { get; set; }
    public DbSet<AdsPosition> AdsPositions { get; set; }
    public DbSet<AdsCustomer> AdsCustomers { get; set; }
}

and in my application startup

i write this code

var context = app.ApplicationServices.GetService<AdminContext>();

       if (!context.Database.EnsureCreated())
            context.Database.Migrate();

when i run application database was created and table generate but __migrationhistory doesn't exist and migration not generate,

when in start up i remove this line code

if (!context.Database.EnsureCreated())

database was created and __migrationhistory table generated,but my model table not generate,

how i can solve this problem ? and run auto migration in EF Core in three tier application?